CN116600769A - Antiperspirant compositions - Google Patents
Antiperspirant compositions Download PDFInfo
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- CN116600769A CN116600769A CN202180083087.1A CN202180083087A CN116600769A CN 116600769 A CN116600769 A CN 116600769A CN 202180083087 A CN202180083087 A CN 202180083087A CN 116600769 A CN116600769 A CN 116600769A
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Abstract
The present application relates to an anhydrous Antiperspirant (AP) composition comprising conventional metal-based AP actives, natural oils, antioxidants and optionally nonionic surfactants, which composition ensures little or no yellow staining of fabrics worn by an individual through multiple use-wash-rinse-dry cycles when such composition is applied to a body part such as the armpit.
Description
Technical Field
The present application relates to Antiperspirant (AP) compositions. The present application more particularly relates to anhydrous antiperspirant compositions comprising conventional metal-based AP actives and natural oils, which when such compositions are used on body parts such as armpits, ensure little or no yellow staining of the fabric through several use-wash-rinse-dry cycles upon repeated use of the fabric. The preferred form of such products is as an aerosol or in stick form.
Background
The present application relates to substantially anhydrous compositions, such as those containing antiperspirant actives. Such actives are added to the compositions to reduce perspiration applied to body surfaces, particularly the underarm areas of the human body, i.e., the armpits. Antiperspirant actives used heretofore are typically astringent metallic salts, such as aluminium or zirconium salts, for example aluminium hydroxychloride or aluminium sesquichloride (aluminium sesquichlorohydrates). Such compositions also include natural oils, which may be unsaturated, such as sunflower oil, for delivering skin care benefits. Because such oils are unsaturated, antioxidants are typically added to such compositions to minimize oxidation of such compounds to ensure minimal color formation. Typically, antioxidants such as ascorbic acid, butylhydroxytoluene (BHT) and other commercially available compounds such as Tinogard TT (pentaerythritol tetra-di-tert-butylhydroxyhydrocinnamate) or Tinogard Q (tris- (tetramethylhydroxy-piperidinol) citrate), both from BASF, have been used. The inventors have found that when such a composition is applied to the underarm area, fabrics contacted with the composition tend to become stained in repeated use (where the fabric may be washed, rinsed and dried between uses).
The inventors have found that nonionic surfactants having a particular low HLB tend to minimize such staining problems when included in such anhydrous AP compositions, such as those in stick or aerosol form. Surfactants are typically included in aqueous compositions to emulsify the oily components. To the inventors' knowledge, there is no incentive to include nonionic surfactant in such anhydrous compositions, nor to add nonionic surfactant.
The present inventors have addressed the problem of staining fabrics when using antiperspirant compositions which typically contain water and comprise a metal-based antiperspirant active and a natural oil in WO2020/078665 by using specific phenolic antioxidants. In the present application they provide a solution to this problem, in particular for substantially anhydrous compositions, by the addition of nonionic surfactants having a specific low HLB value.
Examples of nonionic surfactants already included in the AP composition are typically in aqueous compositions as emulsifiers, or in specific compositions, where the nonionic surfactant has a high HLB value.
US2006115441 (Unilever) discloses in particular examples antiperspirant compositions containing aluminium chlorohydrin, sunflower oil, BHT, nonionic surfactants stearth 2 and stearth 20, but in compositions containing more than 60% water.
US2009324317 (Unilever) discloses a dispenser for anhydrous cosmetic products configured to minimize light damage to ingredients therein, wherein in one embodiment a composition is disclosed comprising aluminum hydroxychloride, sunflower oil, BHT and a nonionic surfactant stearth 100 having an HLB of 18.8.
Thus, no known prior art teaches a solution to the current problem of using a low HLB (less than 11) nonionic surfactant in anhydrous AP compositions.
It is therefore an object of the present application to provide anhydrous antiperspirant compositions comprising a metal-based antiperspirant active and a natural oil that minimize the problem of staining or yellowing of fabrics when worn by individuals using such antiperspirant compositions and in repeated use-wash-rinse-dry cycles.
Disclosure of Invention
According to a first aspect of the present application there is provided an antiperspirant composition comprising:
(a) Metal-based antiperspirant actives;
(b) A natural oil comprising glycerides of unsaturated carboxylic acids/fatty acids;
(c) An antioxidant compound;
(d) A nonionic surfactant having an HLB of less than 11; and
(e) Less than 10% by weight of water.
According to another aspect of the present application, there is provided a method of minimizing staining or yellow coloration of a fabric worn by an individual, the method comprising the steps of: (a) applying the composition of the application to a body part, preferably the armpit, of the individual, followed by (b) washing the fabric, (c) rinsing the fabric and (d) drying the fabric.
Detailed Description
These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present application may be used in any other aspect of the present application. The word "comprising" means "including", but not necessarily "consisting of … …" or "consisting of … …". In other words, the listed steps or options need not be exhaustive. It should be noted that the examples given in the following description are intended to clarify the application and are not intended to limit the application to these examples per se. Similarly, all percentages are weight/weight percentages unless otherwise indicated. Except in the examples and comparative examples, or where otherwise explicitly indicated, all numerical values indicating amounts of material or conditions of reaction, physical properties of materials and/or use in this description and claims are to be understood as modified by the word "about". The numerical range expressed in the format of "from x to y" is understood to include x and y. When describing a plurality of preferred ranges in the format of "from x to y" for a particular feature, it should be understood that all ranges combining the different endpoints are also contemplated.
The compositions of the present application are generally "personal care compositions" suitable for use as described in detail below. Furthermore, the use of the composition of the application is generally for cosmetic or non-therapeutic use.
In some embodiments of the application, the compositions are useful in the therapeutic treatment of hyperhidrosis (extreme sweating).
As used herein, "antiperspirant composition" is meant to include compositions for topical application to the skin of a mammal, particularly a human. Such compositions are preferably leave-on type (leave-on type). Leave-on compositions refer to compositions that are applied to the desired skin surface and held for a period of time (e.g., 1 minute to 24 hours), after which it can be wiped or rinsed away with water, typically during the conventional process of personal washing. The composition may also be formulated into a product that is applied to the human body for improved appearance, cleaning, odor control, or overall aesthetics. The compositions of the present application may be in the form of a liquid, foam, spray, aerosol, gel or stick. As used herein, "skin" refers to skin that is included on any part of the body (e.g., neck, chest, back, arms, armpits, hands, legs, buttocks, and scalp), particularly the armpits.
The compositions of the present application are substantially anhydrous. By "anhydrous" is meant that the composition does not contain added water. However, the composition may comprise some water that is included in the composition from the ingredients formulated to form the composition. The water content may also be the result of water ingress from moisture in the atmosphere, which water content is in equilibrium with the components of the composition. In practice, the composition comprises less than 10 wt%, preferably less than 5 wt%, further preferably less than 2 wt%, most preferably less than 0.5 wt% water, based on the weight of the composition.
The antiperspirant compositions according to the present application comprise a metal-based antiperspirant active. This may be selected from aluminium salts, zirconium salts or mixed aluminium/zirconium salts, preferably from aluminium hydroxychloride, aluminium-zirconium hydroxychloride glycine complex, aluminium-zirconium octachlorohydroxy glycine complex, aluminium-zirconium pentachlorohydroxy, aluminium sesquichloride or mixtures thereof.
Antiperspirant actives for use herein are selected from the group consisting of aluminum salts, zirconium salts, and mixed aluminum/zirconium salts, including both inorganic salts and salts with organic anions and complexes. Particularly preferred astringent salts are the hydroxy halide (hydrochloride) salts, especially the hydroxy chloride (hydrochloride) salts, optionally activated. For aerosol compositions, the antiperspirant active is preferably free of zirconium.
The aluminum hydroxyhalides (Aluminium halohydrates) are generally represented by the general formula Al 2 (OH) x Q y .wH 2 O is defined, wherein Q represents a halogen selected from chlorine, bromine, iodine or mixtures thereof, x varies from 2 to 5, and x+y=6, while wH 2 O represents the hydration (hydration) of the variable. Particularly effective aluminum halide salts of the aluminum chlorohydrate type are known as activated, and are described in EP-A-6739 (Unilever NV et al), the disclosure of which is incorporated herein by reference.
The term "aluminum hydroxychloride" in this context includes materials having specific x and y values, such as aluminum hydroxychloride (aluminium sesquichlorohydrate) and materials in which the hydroxychloride is present as a complex. It should be appreciated that alternative names are sometimes used to indicate the presence of hydroxy substitution, including aluminum hydroxychloride, aluminum oxychloride, or aluminum hydroxychloride.
Zirconium astringent salts for use herein as metal-based antiperspirant actives can generally be prepared from the empirical formula ZrO (OH) 2n-nz B z .wH 2 O represents, wherein z is a variable from 0.9 to 2.0 such that the value 2n-nz is zero or positive, n is the valence of B, and B is selected from chloride, other halide, sulfamate, sulfate, or mixtures thereof. The hydration values of the different degrees possible are defined by wH 2 O represents. Preferably, B represents chloride. Preferably, the variable z is in the range of 1.5 to 1.87. In practice, such zirconium salts are not typically used alone, but as a component of a combined aluminum and zirconium based antiperspirant active.
The above aluminum and zirconium salts may have coordinated and/or bound water in various amounts and/or may be present in the form of polymeric materials, mixtures or complexes. In particular, zirconium hydroxy salts generally represent a range of salts having varying amounts of hydroxy groups. Zirconium aluminum chlorohydroxide may be particularly preferred.
Antiperspirant complexes based on the above-described astringent aluminium and/or zirconium salts are useful as metal-based antiperspirant actives. The complex generally uses a compound having a carboxylate (carboxylate) group, advantageously it is an amino acid. Examples of suitable amino acids include dl-tryptophan, dl-beta-phenylalanine, dl-valine, dl-methionine and beta-alanine, andand preferably has the formula CH 2 (NH 2 ) Glycine of COOH. Some of these Al/Zr complexes are commonly referred to in the literature as ZAG. ZAG actives typically contain aluminum, zirconium and chloride, with Al/Zr ratios of 2 to 10, especially 2 to 6, al/Cl ratios of 2.1 to 0.9 and variable amounts of glycine. Such preferred types of actives are available from Westwood, from Summit and from Reheis. Alternatively, the complex may be preformed with a polyhydric aliphatic alcohol such as propylene glycol or glycerin. Complexes with hydroxy chloride (chlorohydrate) are commonly referred to as chlorohydroxy chloride (chlorohydro).
Mixtures of two or more astringent salts may be used, but it is particularly preferred to use zirconium-free astringent salts, such as aluminium chlorohydrate and so-called activated aluminium chlorohydrate.
According to a particularly preferred aspect of the application, the antiperspirant active is aluminum hydroxychloride, aluminum hydroxychloride or a mixture thereof. The metal-based antiperspirant active preferably comprises from 1% to 50% by weight, more preferably from 2% to 25% by weight, most preferably from 2% to 15% by weight of the composition.
The antiperspirant composition comprises a natural oil. The natural oil is preferably at least one selected from coriander seed oil, borage seed oil, evening primrose oil, corn oil, sunflower oil, safflower oil, coconut oil, algae oil or mixtures thereof. More preferred natural oils are sunflower oil, algae oil or coconut oil, preferably sunflower oil. The natural oil is preferably present in an amount of 1 to 10 wt%, more preferably 1 to 5 wt%, based on the weight of the composition.
The antiperspirant compositions include an antioxidant compound. Suitable and conventional antioxidants commonly included in such compositions may be added in the present application. Such antioxidants are preferably selected from one or more of the following: butyl hydroxytoluene or its derivative, pentaerythritol tetra-di-tert-butyl hydroxy hydrocinnamate (sold as Tinogard TT), or dilauryl thiodipropionate (sold as Tinogard DA), tetramethyl hydroxypiperidinol citrate (sold as Tinogard Q), tocopheryl acetate or ascorbic acid and its derivatives. The antiperspirant composition preferably comprises from 0.001% to 10% by weight, more preferably from 0.01% to 5% by weight, most preferably from 0.01% to 2% by weight of the composition of an antioxidant.
The composition of the application comprises a nonionic surfactant, preferably selected from polyoxyethylene sorbitan alkyl esters (sold as Tween surfactants), fatty alcohol ethoxylates (sold as Brij surfactants) or sorbitan monoesters (sold as Span surfactants), alkyl polyglucosides or C 8 -C 16 Fatty alcohol glycosides; the nonionic surfactant has an HLB of less than 11.0.
Thus, any nonionic surfactant having an HLB value of less than 11.0 can be used in the compositions of the present application.
HLB is the hydrophilic-lipophilic balance, calculated using Griffin method, where HLB = 20x Mh/M, where Mh is the molecular weight of the hydrophilic portion of the molecule, and M is the molecular weight of the entire molecule, giving results on any scale from 0 to 20.
A non-exhaustive list of nonionic surfactants having an HLB value of less than 11 is given below, with the HLB value in brackets.
Ethylene glycol distearate (1), sorbitan trioleate (1.8), propylene glycol isostearate (2.5), ethylene glycol stearate (2.9), sorbitan sesquioleate (3.7), glycerol stearate (3.8), lecithin (4), sorbitan oleate (4.3), sorbitan monostearate NF (4.7), sorbitan stearate (4.7), sorbitan isostearate (4.7), steareth-2 (Steareth-2) (4.9), oleyl polyether-2 (Oleth-2) (4.9), glycerol laurate (5.2), cetyl polyether-2 (Ceteth-2) (5.3), PEG-30 dihydroxystearate (5.5), glycerol stearate SE (5.8), sorbitan stearate (and sucrose oleate (6), PEG-4 dilaurate (6), methyl glucose sesquistearate (6.6), PEG-8), coco-8 (8), PEG-8), lauryl laurate (4.7), PEG-20 almond glycerides (10) and PEG-25 hydrogenated castor oil (10.8).
The most preferred nonionic surfactant for use in the present application is selected from polyethylene glycol dodecyl ether (sold as Brij L4), stearyl polyether-2 (sold as Brij S2), tris (oxyethylene) dodecyl ether (sold as EO 3), or a combination of EO3 and hepta (oxyethylene) dodecyl ether (sold as EO 7). The nonionic surfactant preferably comprises from 0.5% to 5% by weight of the composition.
Without wishing to be bound by theory, the inventors believe that the hydrophilic-lipophilic balance (HLB) of the surfactant plays an important role in the solubilization of the oil during decontamination due to the reduced interfacial tension and the contact points of the oil/water/fiber. Low HLB surfactants are expected to be effective in solubilizing oil compared to high HLB surfactants, which interact with certain ingredients in the composition to provide the benefits of the present application.
The compositions of the present application are preferably delivered as products in aerosol form or in stick form.
The compositions of the present application preferably comprise a topically acceptable carrier, which carrier is anhydrous in the present application. To achieve this, the anhydrous carrier preferably comprises a silicone compound, an alcohol, or a wax. When used, the alcohol may be of low boiling point (C 2 To C 4 ) Alcohols or polyols, preferably polyols.
The composition of the present application preferably comprises a polyol. The polyol (polyhydric alcohol) is also simply referred to as polyol (polyol). The polyol according to the present application is a compound having two or more hydroxyl groups. Suitable classes of polyols that may be included in the compositions of the present application are monomeric polyols, polyalkylene glycols or saccharides. Preferred monomeric polyols are diols; alkylene glycols, such as propylene glycol; glycerol; or xylitol, more preferably propylene glycol.
Suitable polyalkylene glycols are polyethylene glycol or polypropylene glycol. The saccharides used in the present application may be in monomeric, dimeric, trimeric or multimeric form. Preferred sugars include glucose, fructose, mannose, sucrose, threitol, erythritol, sorbitol, mannitol, galactitol, adonitol, dextran, or cyclodextrin. Among them, more preferable saccharides are glucose, fructose, sucrose, sorbitol, mannitol, adonitol, dextran or cyclodextrin.
Other components typically included in conventional antiperspirant compositions may also be added to the compositions of the present application. These components include skin care agents such as emollients, moisturizers, and skin barrier promoters; skin appearance modifiers such as skin lightening agents and skin smoothing agents; antimicrobial agents, in particular organic antimicrobial agents, and preservatives.
In a broad sense, the antiperspirant composition may be cosmetically and topically applied to the skin by one of two methods. Some consumers prefer one method and some prefer another method. In one method, sometimes referred to as the contact method, the composition is rubbed onto the surface of the skin and a portion of the composition is deposited as it passes. In a second method, sometimes referred to as the non-contact method, the composition is sprayed from a dispenser held adjacent to the skin, typically at about 10cm 2 To 20cm 2 Is defined in the region of the substrate. The spray may be formed by mechanical means that create pressure on the contents of the dispenser, such as a pump or squeezable side wall, or by internally generated pressure caused by volatilization of a portion of the liquefied propellant, which dispenser is commonly referred to as a nebulizer.
Broadly, there are two types of contact compositions, one of which is a liquid and is typically applied using a roll-on dispenser, or may be absorbed into or onto a wipe, while in the second of which the antiperspirant active is distributed in a carrier liquid that forms a continuous phase that has gelled. In one variant, the carrier liquid comprises a solvent for the antiperspirant, while in a second variant, the antiperspirant remains as a particulate solid suspended in an oil, typically a blend of oils.
Stick or soft solid compositions
Many different materials have been proposed as gellants for continuous oil phases, including waxes, small molecule gellants, and polymers. They each have their advantages, with the most popular class of gellants already including waxes, at least in part because of their ready availability and ease of processing, particularly including linear fatty alcohol wax gellants. The gelled antiperspirant composition is topically applied to the skin by wiping it over and in contact with the skin, thereby depositing a thin film on the skin.
The nature of the film depends to a large extent on the gelling agent used. Although wax fatty alcohols have been used as gelling agents for many years and are effective for the purpose of gelling, the resulting products are quite ineffective in improving the visual appearance of the skin, particularly the underarm skin, to which the composition has been applied. This problem has been solved by the inclusion of modified (sizing) materials such as dihydroxy or polyhydroxy humectants and/or triglyceride oils.
Ball-type travelling device
Broadly speaking, liquid compositions applicable from the beads can be divided into two categories, namely those in which the antiperspirant active is suspended in a hydrophobic carrier, such as a volatile silicone, and those in which the antiperspirant active is dissolved in a carrier liquid. The latter has proven to be more popular. There are mainly two types of dissolved carrier liquids, namely mainly alcoholic carriers, i.e. most of the dissolved carrier liquid comprises ethanol, and a second type, wherein the carrier liquid is mainly water. The former is used as the present application relates to hydrophobic compositions. The former is very popular because ethanol is a mild biocide in itself.
Aerosol composition
The antiperspirant composition may be delivered by an aerosol composition comprising, in addition to the other ingredients described above, a propellant. Typically, the propellant is used in a weight ratio of 95:5 to 5:95 to the base formulation. Depending on the propellant, in such aerosol compositions the ratio of propellant to base formulation is generally at least 20:80, typically at least 30:70, especially at least 40:60, in many formulations the weight ratio is from 90:10 to 50:50. A ratio in the range of 70:30 to 90:10 is sometimes preferred.
Propellants in this context are typically one of three classes; i) By compressing the liquefied low boiling gas, ii) a volatile ether and iii) a compressed non-oxidizing gas.
i) Classes are generally low boilers, typically boiling below-5 ℃, typically below-15 ℃, especially alkanes and/or halogenated hydrocarbons. Such propellants are typically liquefied at the pressure in an aerosol canister and evaporated to create a pressure at which the composition is expelled from the canister. Examples of suitable alkanes include in particular propane, butane or isobutane. The second class of propellants includes the very volatile ethers, the ether most widely used to date being dimethyl ether. Such propellants may advantageously be used in relatively low weight ratios of propellant to base formulation, for example as low as 5:95. It can also be used in admixture with, for example, a compressible/liquefiable alkane gas. The third class of propellants comprises compressed non-oxidizing gases, in particular carbon dioxide or nitrogen. Inert gases such as neon are theoretical alternatives.
The compositions of the present application may comprise a wide range of other optional components. CTFA personal care ingredients manual (CTFA Personal Care Ingredient Handbook), second edition, 1992 describes a wide variety of non-limiting personal care and pharmaceutical ingredients commonly used in the skin care industry, which are suitable for use in the compositions of the present application, the entire contents of which manual is incorporated herein by reference. Examples include binders, biological additives, buffers, colorants, thickeners, polymers, astringents, fragrances, conditioning agents, exfoliants, pH adjusting agents, preservatives, natural extracts, essential oils, skin sensates (sensates), skin soothing agents and skin healing agents.
According to another aspect of the present application there is provided a method of minimizing staining or yellow coloration of a fabric, the method comprising the steps of: (a) applying the composition of the application preferably to the armpit of an individual, followed by (b) washing the fabric, (c) rinsing the fabric and (d) drying the fabric.
The composition is preferably applied to the armpit. The method is also preferably non-therapeutic or for cosmetic applications.
The application will now be illustrated by means of the following non-limiting examples.
Examples
Antiperspirant aerosol compositions as shown in table 1 below were prepared:
TABLE-1
| Composition of the components | Weight percent |
| Cyclopentasiloxane (cyclophosphascoxane) | 2.5 |
| PPG 14 butyl ether | 3 |
| Sunflower seed oil | 0.5 |
| BHT | 0.1 |
| Aluminum hydroxychloride | 5.5 |
| Distearyldimethylammonium hectorite | 0.6 |
| Propylene carbonate | 0.015 |
| C12-15 alkyl benzoates | 0.5 |
| Octyl dodecanol | 0.12 |
| Nonionic surfactant, type and concentration | See table below; 2 |
| Butane, isobutane, propane | To 100 |
Examples A, B, 1-3: effect of HLB of nonionic surfactant
The effect of including different types of nonionic surfactants as in table-2 in the compositions as given in table-1 was studied and the cleaning efficacy was measured according to the protocol given below. The measurement of yellowing Δb is also given in table 2 after 2 wash cycles.
Scheme for evaluation
In this study, 10X 10cm was taken 2 Is a fabric sample of (c). For 33cm 2 0.3g of an APA base formulation containing 0.05g of a model sebum mixture was applied to the central circular region of (c). Five replicates were performed. The treated samples were incubated in a hot-air oven at 45℃for 12h.
The treated fabric was washed in an IFB front-end washer, programmed to wash and double rinse. The treated fabric was nailed to a clean, air-dried polyester cotton (polycotton) ballast to obtain a load of about 2±0.1kg and placed into the washing machine. The hardness of the water was maintained at 24fH water 2:1, ca: mg. 36g of either Surf Excel QuickWash powder detergent or Persil Non-Bio Liquid detergent was added to the dosing chamber. The samples were dried using a wire drying process for 10 days at room temperature (25 ℃).
A Konika Minolta spectrophotometer Model-2600d was used to measure the intensity of contamination on the samples. L, a, b are measured at three different areas of stained and untreated fabric. Then Δb and Δe are calculated.
Table-2:
the data in the above table show that compositions comprising nonionic surfactants having an HLB of less than 11 provide much better whitening than compositions having a high HLB (> 11) surfactant or no surfactant at all, as evidenced by low Δb values.
Examples C-E, 4: enhancement obtained with other nonionic surfactants in experiments with four wash cycles completed
White color
Similar experiments to those in table 2 above were performed with other surfactants and with four wash cycles. The data are summarized in Table-3 below:
TABLE-3
Brij 58 INCI name is cetyl polyether-20
The data in Table-3 above also demonstrates that the same findings provide much better stain removal than compositions with high HLB (> 11) surfactants or no surfactants at all, compositions containing nonionic surfactants with HLB less than 11.
Examples F-H, 5-7: nonionic surface-active at different ratios in experiments with three wash cycles completed
Whitening obtained by combination of agents
Similar experiments to those of table 3 above were performed with three wash cycles with different ratios of certain surfactants. The data are summarized in Table-4 below:
TABLE-4
| Examples | Surface active agent | Surfactant (wt.%) | HLB | Δb |
| F | - | - | - | 3.70 |
| G | EO7 | 2 | 12.0 | 2.00 |
| H | EO3∶EO7(1∶3) | 2 | 11.0 | 2.53 |
| 5 | EO3 | 2 | 8.2 | 1.60 |
| 6 | EO3∶EO7(1∶1) | 2 | 10.0 | 1.24 |
| 7 | EO3∶EO7(3∶1) | 2 | 9.12 | 1.74 |
The data in table-4 confirm the same findings as in the previous table.
Examples J, 8-10: with different concentrations of nonionic surfactant in experiments with two wash cycles
Whitening obtained by a combination of (a)
Experiments similar to those in table 4 above were performed with a combination of surfactants at different concentrations using two wash cycles. The data are summarized in Table-5 below:
TABLE-5
| Examples | Surface active agent | Surfactant (wt.%) | HLB | Δb* |
| J | - | - | - | 3.89 |
| 8 | EO3∶EO7(1∶1) | 0.5 | 10.1 | 2.82 |
| 9 | EO3∶EO7(1∶1) | 1.0 | 10.1 | 1.95 |
| 10 | EO3∶EO7(1∶1) | 2.0 | 10.1 | 1.44 |
The data in Table-5 above show that combinations comprising different concentrations of nonionic surfactant give the desired whitening effect, with higher concentrations of 1-2 wt% being preferred.
Examples K-N and 11: whitening obtained with the anhydrous compositions of the present application compared to compositions having a high water content
As shown in table-6 below, a high moisture content bead composition was prepared:
TABLE-6
| Composition of the components | Weight percent |
| Aluminum hydroxychloride | 12.0 |
| Sunflower seed oil | 2.0 |
| Dimethylsilyl silica | 0.7 |
| Tinogard TT | 0.05 |
| Essence | 1.0 |
| Water and its preparation method | To 100 |
| Nonionic surfactant, type | See Table 7 below |
Using the base formulation of table-1 (aerosol, anhydrous composition) or the base formulation of table-6 (aqueous beaded composition), the following compositions were prepared. As already mentioned above, the whitening provided by the respective compositions was measured and Δb data is summarized in table 7 below:
table-7:
| examples | Composition and method for producing the same | Surfactant (wt.%) | Δb* |
| K | As in Table-1 | - | 5.38 |
| L | As in Table-6 | - | (**) |
| M | As in Table-6 +Brij S2 | 2.6 | 2.46 |
| N | As in Table-6 +Brij S2 | 5.2 | 2.27 |
| 11 | As in Table-1 +Brij S2 | 2.6 | 1.97 |
The formulation is unstable due to the absence of surfactant in the aqueous and oil formulation. Surfactants are necessary to stabilize the emulsion.
The data in Table 7 above show that the present application is effective only for anhydrous compositions (examples-11), but not for aqueous compositions (examples M and N).
Claims (14)
1. An antiperspirant composition comprising:
a) Metal-based antiperspirant actives;
b) A natural oil comprising glycerides of unsaturated carboxylic acids/fatty acids;
c) An antioxidant compound;
d) A nonionic surfactant having an HLB of less than 11; and
e) Less than 10% by weight of water.
2. The antiperspirant composition of claim 1, wherein the nonionic surfactant is selected from polyoxyethylene sorbitan alkyl esters (sold as Tween surfactants), fatty alcohol ethoxylates (sold as Brij surfactants) or sorbitan monoesters (sold as Span surfactants), alkyl polyglucosides, or C8-C16 fatty alcohol glycosides; the nonionic surfactant has an HLB of less than 11.0.
3. The antiperspirant composition of claim 2, wherein the nonionic surfactant is selected from Brij L4, brij S2, EO3, or a combination of EO3 and EO 7.
4. An antiperspirant composition according to any of the preceding claims, wherein the nonionic surfactant is present in an amount of from 0.5 to 5% by weight of the composition.
5. The antiperspirant composition according to any of the preceding claims, wherein the metal-based antiperspirant active is selected from aluminium salts, zirconium salts or mixed aluminium/zirconium salts, preferably selected from aluminium chlorohydroxy, aluminium-zirconium glycine complexes, aluminium-zirconium octachlorohydroxy glycine complexes, aluminium-zirconium pentachlorohydroxy, aluminium sesquichloride or mixtures thereof.
6. The antiperspirant composition of claim 5, wherein the metal-based antiperspirant active is aluminum hydroxychloride, or a mixture thereof.
7. The antiperspirant composition according to any of the preceding claims, comprising from 1 to 50% by weight of the composition of a metal-based antiperspirant active.
8. The antiperspirant composition according to any of the preceding claims, wherein the natural oil is selected from at least one of coriander seed oil, borage seed oil, evening primrose oil, corn oil, sunflower oil, safflower oil, coconut oil, and algae oil.
9. An antiperspirant composition according to claim 8, wherein the natural oil is sunflower oil, algae oil or coconut oil, preferably sunflower oil.
10. The antiperspirant composition according to any of the preceding claims, comprising from 0.1 to 10% by weight of the composition of natural oil.
11. The antiperspirant composition according to any of the preceding claims, wherein the antioxidant is selected from butyl hydroxytoluene, pentaerythritol tetra-di-t-butyl hydroxyhydrocinnamate (sold as Tinogard TT), or dilaurylthiodipropionate (sold as Tinogard DA).
12. The antiperspirant composition according to any of the preceding claims, comprising from 0.01 to 2% by weight of the composition of an antioxidant compound.
13. The antiperspirant composition according to any of the preceding claims, delivered in stick form or in an aerosol canister.
14. A method of minimizing staining or yellow coloration of fabric worn by an individual, the method comprising the steps of: (a) applying the composition according to any of the preceding claims to a body part, preferably an armpit, of the individual, followed by (b) washing the fabric, (c) rinsing the fabric and (d) drying the fabric.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN202021053948 | 2020-12-11 | ||
| IN202021053948 | 2020-12-11 | ||
| EP21189217.9 | 2021-08-02 | ||
| PCT/EP2021/084932 WO2022122884A1 (en) | 2020-12-11 | 2021-12-09 | An antiperspirant composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116600769A true CN116600769A (en) | 2023-08-15 |
Family
ID=87601324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180083087.1A Pending CN116600769A (en) | 2020-12-11 | 2021-12-09 | Antiperspirant compositions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116600769A (en) |
-
2021
- 2021-12-09 CN CN202180083087.1A patent/CN116600769A/en active Pending
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